DHCP works for UNIX stations but not for Windows

[Mário Gamito]

Hi,

I have a DHCP server installed at 192.168.1.2
I have a DNS server running a .lan domain at the same IP.

I have a web server at 192.168.1.20 and an email server at 192.168.1.4 
both configured manually.

Only the Window stations get their data from the DHCP server.

When I try to browse www.wwlib.lan from a Windows Machine, I get nothing.
If I telnet the webserver at port 80 it just hangs, but if I telnet from 
  the Linux email server, it responds correctly. Yet, wget doesn't work!

Can someone help me, please ?

My dhcpd.conf relevant data follows my signature.

Warm Regards,
Mário Gamito

--

ddns-update-style none;

authoritative;
subnet 192.168.1.0 netmask 255.255.255.0  {

         range 192.168.1.31 192.168.1.254;

#       time in seconds
         default-lease-time 604800;
         max-lease-time 1209600;
         option subnet-mask 255.255.255.0;
         option broadcast-address 192.168.1.255;
         option routers 192.168.1.1;
         option domain-name-servers 192.168.1.2;
         option domain-name "foobar.lan";
}